222 HISTORY OF PERSIA CHAP. Nicolo Crespo, the Duke of the Archipelago, among whose sons-in-law was Caterino Zeno, a merchant-prince of Venice; he was selected to visit the Court of the "White Sheep" and to persuade its monarch to attack Mohamed II., the conqueror of Constantinople. Caterino Zeno was most kindly received at the Court of Uzun Hasan, where his relationship with the Queen made everything smooth, and the monarch was persuaded without great difficulty to attack the Ottoman Empire in conjunction with the fleets of Venice, which were operating on the coast of Armenia. In A.D. 1472 hostilities were opened and a horde of light horsemen ravaged Asia Minor, but a flying column under Mustafa, a son of the Sultan, defeated a Persian army. In the following year a powerful army of the Osmanlis invaded Persia, but being repulsed in a desperate attempt to cross the Euphrates retired, and Uzun Hasan, who had pursued, was in turn defeated and forced to retreat with heavy loss. After this, Caterino Zeno was sent as an ambassador from Uzun Hasan to rouse the princes of Christendom, and Josafa Barbaro took his place, but, not receiving support from Europe, Uzun Hasan wisely made no second attack on the formidable Ottoman power. The Rise of the Shaybanid Dynasty.óJuji, son of Chengiz Khan, has been referred to at the beginning of Chapter LVL His fifth son, Shayban by name, who accompanied Batu into Hungary in A.D. 1240, was granted an appanage between the Ural Mountains and the rivers Ilek and Irghiz, where his descendants multiplied. Coming down to the fifteenth century of the Christian era, we find among his descendants a certain Abul Khayr, who overran Khwarazm and Turkestan. His son was Mohamed Shaybani, known also as Shahi Beg Khan, almost the last great warrior of his race, who, after serving Sultan Ahmad, finally overthrew the last princes of the line of Tamerlane by the capture of Herat from the two sons of Sultan Husayn in A.H. 913 (1507). He founded the Uzbeg kingdom which has lasted down to the present day, the Amir of Bokhara and the Khan of Khiva both being lineal descendants of Shayban.